下げる
【さげる】
to hang, to suspend, to wear (e.g. decoration), to lower, to reduce, to bring down, to demote, to move back, to pull back, to clear (plates), to remove (food, etc. from table or altar)

下がる
【さがる】
to come down, to go down, to fall, to drop, to sink, to get lower, to hang, to dangle, to move back, to step back, to withdraw, to retire, to deteriorate, to fall off, to be downgraded, to get closer to the present day, to go south

下る
【くだる】
to descend, to go down, to come down, to be handed down (of an order, judgment, etc.), to pass (of time), to surrender, to capitulate, to be less than, to be inferior to, to have the runs, to have diarrhea, to pass (in stool), to be discharged from the body, to depreciate oneself, to be humble

下す
【くだす】
to make a decision, to draw a conclusion, to give a judgement, to hand down a verdict, to pass a sentence, to give an order, to let go down, to lower, to do oneself, to do by oneself, to beat, to defeat, to have loose bowels, to have diarrhea, to pass (in stool), to discharge from the body, to do in one go, to do to the end without stopping

下さる
【くださる】
to give, to confer, to bestow, to kindly do for one, to oblige, to favour, to favor

下ろす
【おろす】
to take down (e.g. flag), to launch (e.g. boat), to drop, to lower (e.g. ladder), to let (a person) off, to unload, to discharge, to drop off (a passenger from a vehicle), to let (a person) off, to withdraw (cash), to wear (clothing) for the first time, to fillet (e.g. a fish)

降りる
【おりる】
to descend (e.g. a mountain), to go down, to come down, to alight (e.g. from bus), to get off, to disembark, to dismount, to step down, to retire, to give up, to quit, to be granted, to be issued, to be given, to form (of frost, dew, mist, etc.), to be passed (from the body; e.g. of a roundworm)